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A comment on GPSJam: Daily Maps of GPS Interference. Parent comment

Re:GPSJam: Daily Maps of GPS Interference by londons_explore on Wednesday July 27, 2022 @07:29AM (#32249201)
The crypto for US military GPS uses the same keys worldwide, and rotated ~ weekly. That means if you capture any device which has the crypto keys, then you can spoof military GPS for the rest of the week, allowing you to do lots more damage.

Therefore, the military often doesn't even use the keys in their own devices.

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Re:GPSJam: Daily Maps of GPS Interference by TechBro8615 on Wednesday July 27, 2022 @09:04AM (#32249922)
How do you know this?
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Re:GPSJam: Daily Maps of GPS Interference by londons_explore on Wednesday July 27, 2022 @09:13AM (#32250002)
It's in the published specs of the satellites. They have a whole key schedule bit.
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